CN201015585Y - endoscope - Google Patents

Abstract

The utility model provides an endoscope, wherein the bending part (10) is arranged on the terminal part side of the insertion part (7), and the base end side of the bending operation cable (14) connected between the terminal part and the bending part is wound The rotating body (35, 36) is fixed in a wound state, and the rotating body is rotatably supported on the large-diameter part (15) on the base end side of the insertion part, and a power transmission unit (34) is provided in the large-diameter part. ), the power transmission unit converts the linear motion of the working shaft body (37-40) that can move in the straight forward direction into the rotary motion of the rotary body. In addition, the drive source unit (8B) is detachably connected to the inserted On the large-diameter part of the base end side of the part, an action unit is provided in the drive source unit. 19) the driving force and the action of the drive shaft body (60, 61) moving in the straight forward direction makes the working shaft body carry out straight forward motion.

Description

endoscope

technical field

The utility model relates to an endoscope, in particular to a drive source unit detachable endoscope.

Background technique

Patent Document 1 discloses an endoscope apparatus in which an insertion portion of an endoscope and a near-side operation portion disposed on a proximal end portion of the insertion portion are detachably joined by a detachable portion. Here, in the insertion portion of the endoscope, a bending portion capable of bending deformation is disposed between the portion formed of the elongated flexible portion and the distal end portion. On the side of the operation part, an operation knob of a bending operation mechanism for performing a bending operation on the bending part is arranged.

In addition, the end portions of four wire cables for bending operation are fixed to the end portion of the bending portion. Proximal end portions of these cables extend toward the proximal end portion side of the insertion portion. A transmission mechanism for transmitting the driving force transmitted from the operation knob to the bending portion side is disposed on the base end side of the insertion portion. The transfer mechanism has a guide wheel and a driven shaft that reverse the direction of the four cables. And, the base end portion of the cable is connected to the driven shaft through the guide wheel.

Furthermore, a pinion gear is fastened to the drive shaft of the operation knob of the operation part. A pair of racks are engaged with the pinion to face each other, and a drive shaft connected to the racks is provided. In addition, when the base end side portion of the endoscope insertion portion and the operation portion are joined by the detachable portion, the bending operation is performed by aligning the drive shaft and the driven shaft and moving the driven shaft forward and backward.

Patent Document 1: Japanese Patent Laid-Open No. 2000-014628

However, in the structure of the above-mentioned Patent Document 1, since each cable requires a guide wheel for reversing the direction of the cable at the base end side portion of the insertion portion, it is necessary to assemble a plurality of guide wheels in the endoscope. The power transmission mechanism on the detachable part between the base end side part of the insertion part and the operation part. Therefore, the size of the power transmission mechanism becomes large, and there is a problem that it is difficult to downsize the detachable portion between the proximal end portion side portion of the endoscope insertion portion and the operation portion.

In addition, if the minimum bending radius of the cable is reduced, the cable may break, so the radius of the guide wheel cannot be made smaller than or equal to the minimum bending radius of the cable. In addition, a structure is adopted in which the direction-reversed base end side portion of the cable is pushed by the guide wheel. The above-mentioned situation is a factor hindering the miniaturization of the detachable part between the proximal end part side part of the endoscope insertion part and the operation part.

Utility model content

The present invention is proposed in view of the above-mentioned problems, and its object is to provide an endoscope that can reduce the size of the base end side portion of the insertion portion and the attachment and detachment portion of the portion attached thereto, and Therefore, attachment and detachment between the base end side portion of the insertion portion and the portion attached thereto can be easily performed.

The first aspect of the present utility model is an endoscope, which is characterized in that it includes: an insertion part that can be inserted into a body cavity; constituted; a cable whose distal end side is connected to the above-mentioned bending part, and whose base end side extends toward the base end side of the above-mentioned insertion part, and the cable is a cable for bending operation of the above-mentioned bending part; On the base end side of the above-mentioned insertion part; a rotating body, which is rotatably supported on the above-mentioned connection part, and the base end side of the above-mentioned cable is fixed to the rotating body in a wound state; a power transmission unit, which It is arranged on the above-mentioned connection part and has a working shaft body that can move in the straight direction. The power transmission unit converts the straight-forward motion of the above-mentioned working shaft body into the rotary motion of the above-mentioned rotating body; the drive source unit is detachable It is connected with the above-mentioned connection part, and has a driving force generation unit that generates a driving force for bending the above-mentioned bending part; an action unit, which is arranged in the above-mentioned drive source unit, has a drive shaft that can move in a straight forward direction, and in the above-mentioned When the driving source unit is connected to the connecting portion, the actuation unit makes the working shaft move linearly according to the movement of the driving shaft, wherein the driving shaft moves in the straight direction.

And, in the endoscope according to the first aspect of the present invention, when connecting the connection part on the proximal end side of the insertion part and the drive source unit, the operation of the drive shaft body of the drive source unit and the power transmission unit of the connection part is performed. The shaft bodies can be interlockedly engaged. In this state, the drive shaft is moved in the straight-forward direction by the driving force from the drive force generating unit, and the actuation shaft is moved straightly by the motion of the drive shaft. At this time, the linear movement of the working shaft body is converted into the rotational movement of the rotating body through the power transmission unit. By the rotational movement of the rotating body, the cable for bending operation of the bending part is pulled, and the bending operation of the bending part is performed.

In the second aspect of the present utility model, in the endoscope of the first aspect of the present utility model, it is characterized in that the above-mentioned action unit has: a rotating unit that can rotate by means of the driving force from the above-mentioned driving force generating unit; power conversion A unit for linearly advancing the drive shaft body in conjunction with the rotation of the rotation unit.

In the endoscope of the second aspect of the present invention, the rotating unit of the action unit is rotated by the driving force from the driving force generating unit, and the driving shaft is driven by the power conversion unit in conjunction with the rotation of the rotating unit. The body moves straight forward.

According to a third aspect of the present invention, in the endoscope according to the first or second aspect of the present invention, the drive shaft body has an abutment portion, and when the drive source unit is connected to the connection portion, The abutting portion is in contact with the end of the actuating shaft in an abutting state, and the actuating unit has a unit for driving the actuating shaft in a straight-ahead motion direction by means of a pressing force when the driving shaft performs a straight-ahead motion. .

In the endoscope according to the third aspect of the present invention, when the drive source unit and the connecting portion are connected, the abutting portion of the drive shaft body and the end portion of the operating shaft body are brought into abutting state. Therefore, the actuation shaft is driven in the direction of the straight movement by the pressing force when the drive shaft performs the straight movement.

According to a fourth aspect of the present invention, in the endoscope according to the first or second aspect of the present invention, it is characterized in that the above-mentioned working shaft body has an engaging part detachably engaged with the above-mentioned driving shaft body, and has a A detachment preventing portion that prevents the actuating shaft body from coming out of the driving shaft body when the driving source unit is connected to the connecting portion.

In the endoscope according to the fourth aspect of the present invention, when the drive source unit and the connecting portion are connected, the engagement portion of the operating shaft is detachably engaged with the drive shaft. Therefore, when the drive source unit and the connecting portion are connected, the working shaft body is prevented from falling out from the drive shaft body.

According to a fifth aspect of the present invention, in the endoscope according to the first aspect of the present invention, the rotating body has a pinion, the working shaft body has a rack portion meshing with the pinion, and the power transmission The unit has a rack and pinion mechanism including the rack portion and the pinion.

In the endoscope according to the fifth aspect of the present invention, when the connecting portion on the base end side of the insertion portion is connected to the driving source unit, when the driving force from the driving force generating unit is used to make the driving shaft body move in the straight direction When the operation is performed and the working shaft body performs linear motion according to the action of the driving shaft body, the working shaft body is moved by the rack and pinion mechanism of the meshing part between the rack part of the working shaft body and the pinion of the rotating body. The linear motion is converted into the rotary motion of the rotating body.

According to the present invention, it is possible to provide an endoscope that can miniaturize the attachment and detachment portion between the proximal end portion side of the insertion portion and the portion attached to and detachable thereon, and can easily carry out the proximal end portion of the insertion portion. Attachment and detachment between side parts and parts attached to them.

Description of drawings

Fig. 1 is a schematic configuration diagram of the whole system of the detachable endoscope according to the first embodiment of the present invention.

2 is a side view showing a state in which a proximal connection portion of an insertion portion of the detachable endoscope and a power unit are separated.

3 is a longitudinal sectional view showing an internal structure of a proximal connection portion of an insertion portion of the detachable endoscope according to the first embodiment.

Fig. 4 is a sectional view taken along line IV-IV in Fig. 3 .

Fig. 5 is a cross-sectional view along line V-V in Fig. 3 .

Fig. 6 shows the state of use of the endoscope according to the first embodiment, (A) is a plan view showing the arrangement state of the drive shaft body and the working shaft body when the bending part is kept in an unbent state, and (B) is a plan view showing A plan view of the arrangement state of the drive shaft and the working shaft when the bending portion is bent.

7(A) is a plan view showing the connection state between the pulley and the pinion gear of the power transmission unit built in the connection member of the endoscope according to the first embodiment, and (B) is a cross-sectional view showing the pulley of the power transmission unit. Side view of the upper part of the connection between the pinion and pinion.

8 is a diagram illustrating the operation of the endoscope according to the second embodiment of the present invention, (A) is a plan view showing the arrangement state of the drive shaft body and the working shaft body when the bending portion is kept in an unbent state, (B) is a plan view showing the arrangement state of the drive shaft body and the working shaft body when the bending part is bent in one direction, and (C) is a plan view showing that the bending part is bent in the other direction. In the case of , the top view of the arrangement state of the drive shaft body and the work shaft body.

9 is a view showing the structure of main parts of an endoscope according to a third embodiment of the present invention, and (A) is a longitudinal sectional view of main parts showing a state in which the engaging portion between the drive shaft body and the working shaft body is separated; , (B) is a perspective view showing a notch of the drive shaft body, and (C) is a longitudinal sectional view of main parts showing a state in which the engagement portion between the drive shaft body and the working body is engaged.

Fig. 10 is a side view showing a state in which a power unit is separated from a proximal connection portion of an insertion portion of a detachable endoscope according to a fourth embodiment of the present invention.

Fig. 11 is a schematic configuration diagram of the whole system of the detachable endoscope according to the fifth embodiment of the present invention.

Label description

7: insertion part; 8A: mirror body part; 8B: driving source unit; 10: bending part; 14: cable; 15: large-diameter part (connecting part); 19: driving force generating unit; ; 34: power transmission unit; 35, 36: rotating body; 37-40: working shaft body; 60, 61: driving shaft body.

Detailed ways

Next, a first embodiment of the present invention will be described with reference to FIGS. 1 to 7(A) and (B). FIG. 1 is a schematic configuration diagram of an entire system of an endoscope according to the present embodiment. This endoscope system is provided with a detachable endoscope 1 , a light source device 2 , a video processor 3 , a monitor 4 , a motor control unit 5 , and an operation unit 6 as an input device for operation of the endoscope 1 .

In addition, FIG. 2 shows a detachable endoscope 1 . The detachable endoscope 1 is provided with: a scope portion 8A having an elongated insertion portion 7 capable of being inserted into a body cavity; and a drive source unit 8B detachably attached to the scope portion. 8A connection.

The insertion part 7 of the mirror body part 8A is provided with: an elongated insertion tube part 9 formed by a rigid tube part such as a metal tube or a flexible tube part; 10 ; and a rigid end structure portion 11 connected to the end of the bent portion 10 .

Built-in in this terminal structure part 11: objective lens 64; For the imaging element such as CCD12 (referring to Fig. 1) that is used for carrying out photoelectric conversion to the image formed by this objective lens 64; Illumination lens 65; 13 end portion etc. In addition, the distal end surface of the distal structure part 11 is provided with: an opening of an air and water supply pipe 115 to be described later built into the insertion part 7; a distal opening of a treatment instrument through pipe 112 to be described later; A plurality of substantially ring-shaped curved pieces of the curved portion 10 are arranged side by side along the axial direction of the insertion portion 7 and are rotatably connected together by rotating pins such as rivets.

In addition, end sides of four bending operation cables 14 for bending the bending section 10 in four directions, for example, up, down, left, and right are connected to the bending section 10 . The base end side of each cable 14 extends toward the base end side of the insertion portion 7 .

Further, on the proximal end side of the insertion tube portion 9, a large-diameter portion (connection portion) 15 having a larger diameter than most of the insertion tube portion 9 is provided. At the end portion of the large-diameter portion 15 , there is provided a connection end portion 16 on the mirror body portion 8A side that is detachably connected to the drive source unit 8B.

In addition, a treatment tool penetration portion 111 protrudes from the large-diameter portion 15 on the proximal end portion side of the scope portion 8A. Furthermore, a treatment tool penetration duct 112 serving also as a suction duct, a water supply duct 113 , and an air supply duct 114 are provided inside the scope portion 8A. The end portion of the air supply pipe 114 is connected to the end portion of the water supply pipe 113 . Furthermore, an air and water supply duct 115 is formed at a position closer to the terminal side than the connection portion between the water supply duct 113 and the air supply duct 114 . In addition, the proximal end portion of the treatment tool penetration duct 112 communicates with the treatment tool penetration portion 111 .

The drive source unit 8B is provided with a unit main body 17 having approximately the same diameter as the large-diameter portion 15 of the mirror body portion 8A. At the end portion of the unit main body 17, a connection end portion 18 on the drive source unit 8B side that is detachably connected to the connection end portion 16 of the mirror body 8A is provided. Also, inside the unit main body 17, a driving force generating unit 19 for generating a driving force for bending the bending portion 10 is arranged. The driving force generating unit 19 is provided with: a drive motor 19a for vertical bending operation to bend the bending portion 10 in the vertical direction; and a drive motor 19b for horizontal bending operation to bend the bending portion 10 in the left and right direction. .

Moreover, the terminal part of the universal cable (cable) 20 is connected to the base end part of the unit main body 17 of the drive source unit 8B. Built in this universal cable 20 are: a CCD cable 21 that transmits an image signal from the CCD 12; a plurality of cables such as a motor cable 22 for supplying power to the driving motors 19a, 19b of the driving force generating unit 19; and an optical fiber 13, etc. . A connector 23 that is detachably connected to the light source device 2 is disposed at a base end portion of the universal cable 20 . Then, the illumination light emitted from the light source device 2 is supplied to the scope portion 8A via the optical fiber 13 .

In addition, a video cable 24 connected to the CCD cable 21 and a motor cable 25 connected to the motor cable 22 are connected to the connector 23 . Also, the video cable 24 is detachably connected to the video processor 3 via a video connector 24a, and the motor cable 25 is detachably connected to the motor control unit 5 via an electrical connector 25a. Also, the video processor 3 is connected to a monitor 4 . In addition, the observation image of the mirror body part 8A captured by the CCD 12 is input into the video processor 3 through the CCD cable 21 and the video cable 24 in the state of being converted into an electric signal, and the video processing is carried out by the video processor 3. After the signal processing, the observed image of the scope portion 8A is displayed on the screen of the monitor 4 .

In addition, an operation unit 6 for operation of the endoscope 1 is connected to the motor control unit 5 through a cable 27 . The operating unit 6 has a head 28 that can be operated by the user with one hand, substantially similar to a mouse for a personal computer. The machine head 28 is equipped with a joystick 29a for remotely operating the bending part 10, an air supply and water supply operation button 116, a suction button 117, and other remote control switches 29b.

3 shows the internal structure of the large-diameter portion 15 of the mirror body portion 8A. The large-diameter portion 15 of the scope portion 8A is provided with a cylindrical case 30 and a disc-shaped end plate 31 fixed to close an opening on the terminal end side of the case 30 . An O-ring 32 is provided between the outer peripheral surface of the end plate 31 and the inner peripheral surface of the terminal portion of the housing 30 . The O-ring 32 seals watertightly between the outer peripheral surface of the end plate 31 and the inner peripheral surface of the terminal portion of the housing 30 .

In addition, a substrate 33 is arranged inside the casing 30 . The base plate 33 extends vertically across the entire length of the large-diameter portion 15 in a state of roughly dividing the inside of the housing 30 into two spaces as shown in FIG. 4 . One end portion of the base plate 33 is fixed to the end plate 31 by a fixing screw (not shown).

In addition, in FIG. 4, in the large-diameter portion 15 of the mirror body portion 8A, a power transmission unit 34 is built in the space on the right side of the substrate 33, and the power transmission unit 34 transmits the curved portion supplied from the drive source unit 8B side. The driving force of 10 is transmitted as the pulling force of the cable 14 for bending operation. The power transmission unit 34 is provided with two (first, second) rotating bodies 35 , 36 and four working shaft bodies 37 , 38 , 39 , 40 .

As shown in FIG. 7(B), the first rotating body 35 as one has a pinion 35a and a pulley 35b fixed to the pinion 35a. Here, two pin insertion holes are formed in the fitting portion of the pinion gear 35a and the pulley 35b. The pins 41 are lightly pressed into these pin insertion holes and fixed. Thus, the pinion gear 35a and the pulley 35b rotate integrally.

The other second rotating body 36 also has a pinion 36a and a pulley 36b fixed to the pinion 36a. Two pin insertion holes are formed in the fitting portion of the pinion gear 36a and the pulley 36b. The pin 41 is lightly pressed into these pin insertion holes and fixed, so that the pinion 36a and the pulley 36b rotate integrally.

In addition, a pinion shaft 42 is vertically provided on the base plate 33 . The first rotating body 35 and the second rotating body 36 are attached to the pinion shaft 42 . Here, between the first rotator 35 and the second rotator 36, and between the second rotator 36 and the base plate 33, gaskets 43 made of resin, such as nylon and polyacetal, are arranged respectively, and resin-made gaskets 43 are arranged. The washers 43 are mounted so as not to interfere with their rotation relative to each other.

In addition, a nut 45 is screwed to the tip of the pinion shaft 42 via a washer 44 . Accordingly, the first rotating body 35 and the second rotating body 36 are independently and rotatably supported on the pinion shaft 42 .

Also, the base end sides of two vertical bending operation cables 14 for bending the bending portion 10 in, for example, upward and downward directions are fixed to the pulley 35 b of the first rotating body 35 in a wound state. Also, the base end sides of two right and left bending operation cables 14 for bending the bending portion 10 in, for example, left and right directions are fixed to the pulley 36 b of the second rotating body 36 in a wound state.

In addition, on both sides of the pinion 35a of the first rotating body 35 (in FIG. 3 and FIG. 4, above and below the pinion 35a), a pair of operating shaft bodies 37 and 38 for vertical bending operations are arranged in parallel and opposed to each other. . Rack portions 37a, 38a meshing with the pinion gear 35a are provided on these operating shaft bodies 37, 38, respectively. The respective operation shaft bodies 37, 38 are not provided with the rack portions 37a, 38a on the base end side (end plate 31 side) approximately half of the length, but are configured as shafts with a circular cross section. In addition, a shaft portion having a circular cross section without the rack portion 37a, 38a is also provided at the end portion on the distal end portion side of the operation shaft bodies 37, 38.

On both sides of the pinion 36a of the second rotating body 36 (up and down the pinion 36a in FIG. 3 and FIG. 4 ), a pair of operation shafts 39 and 40 for left and right bending operations are arranged to face each other in parallel. Rack portions 39a, 40a that mesh with the pinion gear 36a are provided on these operation shaft bodies 39, 40, respectively. In each of the operation shaft bodies 39, 40, the rack portion 39a, 40a is not provided on the base end side (end plate 31 side) of approximately half the length, but is configured as a shaft with a circular cross section. In addition, a shaft portion having a circular cross section without the rack portion 39a, 40a is also provided at the end portion on the distal end portion side of the operation shaft body 39,40.

Also, a rack-and-pinion mechanism is constituted in which the linear movement of the operating shaft bodies 37, 38 is converted into the first rotating body through the meshing portion of the rack portions 37a, 38a of the operating shaft bodies 37, 38 and the pinion gear 35a. 35° of swivel motion. Likewise, a rack-and-pinion mechanism is also constructed in which the linear motion of the working shaft body 39, 40 is converted into the second rotation through the meshing portion of the rack portion 39a, 40a of the working shaft body 39, 40 and the pinion 36a. The rotational movement of the body 36.

In addition, four through holes 49, 50, 51, 52 are formed on the end plate 31, and the four through holes 49, 50, 51, 52 are used to make the cross sections of the four working shaft bodies 37-40 circular. The shaft is inserted through. In addition, the four operating shaft bodies 37 to 40 are inserted through the through holes 49 , 50 , 51 , and 52 so as to be movable in the straight direction along the axial direction of the insertion portion 7 . In addition, the proximal end portions of the four operating shaft bodies 37 to 40 are held in a state protruding from the through holes 49 , 50 , 51 , and 52 of the end plate 31 to the outside of the large-diameter portion 15 . Therefore, as shown in FIG. 2 , the shaft end portions on the base end portion side of the four operation shaft bodies 37 to 40 are held in a protruding state on the connecting end portion 16 on the side of the scope portion 8A. In addition, on the connection end portion 16 on the side of the scope portion 8A, an engaging pin 47 for an attachment and detachment mechanism to be described later protrudes from the outer peripheral surface of the base end portion of the large-diameter portion 15 .

In addition, in the four through holes 49, 50, 51, 52 of the end plate 31, on the fitting parts between them and the shafts of the circular cross-sections of the respective working shaft bodies 37-40, O Type sealing ring 53. And, by this O-ring 53 , the four through-holes 49 , 50 , 51 , 52 of the end plate 31 and the fitting portions of the respective operation shaft bodies 37 to 40 are watertightly sealed.

On the base plate 33, there are screwed respectively: two first guide members 54, 55 for guiding the movement of each of the working shaft bodies 37 to 40 in the straight direction from the outside of each of the working shaft bodies 37 to 40; Two second guide members 56, 57 for the movement of each of the operating shaft bodies 37-40 in the straight forward direction. In FIGS. 3 and 4 , on the first guide member 54 located above the pinion 36a, protruding protrusions 54a, 54b for guiding are protrudingly provided on the side opposite to the operating shaft bodies 37, 39, respectively. These protrusions 54a, 54b are provided so as to extend in the axial direction of the operating shaft bodies 37, 39, respectively. Similarly, in Fig. 3 and Fig. 4, on the first guide member 55 located on the lower side of the pinion 36a, on the side opposite to the working shaft body 38, 40, protruding protrusions 55a, 55a and 55a for guiding are provided respectively. 55b. These protrusions 55a, 55b are provided so as to extend in the axial direction of the operating shaft bodies 38, 40, respectively.

Slits 37 b , 38 b , 39 b , and 40 b extending in the axial direction are respectively provided on the outer peripheral surface of each of the operation shaft bodies 37 to 40 on the opposite side to the rack portions 37 a to 40 a. 3 and 4, the protrusions 54a, 54b of the first guide member 54 on the upper side of the pinion 36a, and the slits 37b, 39b of the working shaft body 37, 39 can be aligned along the working shaft body 37. , 39 are engaged in an axial sliding manner. Similarly, in FIGS. 3 and 4 , the protrusions 55a, 55b of the first guide member 55 on the lower side of the pinion 36a, and the slits 38b, 40b of the working shaft body 38, 40 can move along the working shaft body 38. , 40 are engaged in an axial sliding manner.

In addition, the slits 37b to 40b of the operation shafts 37 to 40 are not provided over the entire length of the operation shafts 37 to 40, but are provided only in portions substantially facing the racks 37a to 40a.

And, as shown in FIG. 5, the second guide members 56, 57 are disposed inside the respective working shaft bodies 37-40, and are connected to the shaft portion and the distal end of the circular cross-section on the base end side of the respective working shaft bodies 37-40. The cross-section on the side of the pinion is in contact with the shaft portion, so that the shaft portion of each working shaft body 37-40 is restricted from being too close to the pinion gears 35a, 36a.

And, by the two first guide members 54, 55 arranged on the outside of each work shaft body 37-40, and the two second guide members 56, 57 arranged on the inside, each work shaft body 37-40 is restricted in its position. The position in the direction in which the pinion gears 35a, 36a are separated. In addition, the engagement between the slits 37b-40b of the work shafts 37-40 and the protrusions 54a, 54b, 55a, 55b of the first guide members 54, 55 restricts the movement of the work shafts 37-40. 40 is the axial position of the pinion shaft 42 . Accordingly, the movement of each of the operating shaft bodies 37 to 40 in the straight forward direction is guided.

In addition, on the first guide members 54, 55 and the second guide members 56, 57, at the portions facing the pulley 35b of the first rotator 35 and the pulley 36b of the second rotator 36, respectively, there are formed straightly extending To the protruding portion 46 at a location close to the pulleys 35b, 36b. The protruding portions 46 of the first guide members 54, 55 and the second guide members 56, 57 are formed in an arc shape along the shape of the pulleys 35b, 36b. In addition, the cables 14 wound around the pulleys 35b, 36b are prevented from being loosened from the pulleys 35b, 36b by the protruding portions 46 of the first guide members 54, 55 and the second guide members 56, 57.

As shown in FIG. 5 , on the base plate 33 , an approximately L-shaped interference preventing member 58 is screwed, and the interference preventing member 58 is arranged on the outer side of the distal end portion of each of the working shaft bodies 37 to 40 (in FIG. , is the position of the upper side of the working shaft body 37,39 and the lower side of the working shaft body 38,40). The cables 14 are disposed outside the interference preventing members 58 , respectively. Here, when bending the bending part 10, the cable 14 on the opposite side to the cable 14 pulled for the bending operation is pulled toward the insertion part 7 side along with the bending operation. At this time, the cable 14 is slightly slack inside the large-diameter portion 15 , but the interference preventing member 58 prevents the slack cable 14 from interfering with the operation shaft bodies 37 to 40 advancing and retreating during the bending operation.

And, in FIG. 4 , in the large-diameter portion 15 of the mirror body portion 8A, in the space on the left side of the substrate 33, there are arranged: the optical fiber 13 built in the insertion portion 7, the CCD cable 21, the water supply pipe 113, Air supply pipe 114 and suction pipe 118 and the like.

In addition, the treatment tool inserted through the treatment tool penetration portion 111 is inserted into the treatment tool penetration duct 112 , and the treatment tool penetration duct 112 is also used as a passage for the aspirated substance when suction is performed. The treatment instrument through-line 112 is connected to another suction line 118 via a bifurcation 119 . In addition, the aspirated substance can be sucked from the treatment tool penetration duct 112 into the suction duct 118 through the branch portion 119 .

And, as shown in Fig. 6 (A), (B), in drive source unit 8B, be provided with the first drive motor 19a as the drive source of bending operation usefulness up and down, and the first drive motor 19a as the driving source of bending operation usefulness left and right. Two driving motors 19b. In addition, in this embodiment, bending in four directions was shown as an example, however, since the operating unit for bending operation in the up and down directions built in the driving source unit 8B, and the bending operation in the left and right direction The action units have the same structure, so only the structure of the action unit for the bending operation in the up and down directions will be described here.

The operation unit for bending operation in the up-down direction has a drive pinion 59 and a pair of drive shafts 60 and 61 provided on the rotation shaft of the drive motor 19a. A pair of drive shaft bodies 60 and 61 are disposed parallel to each other on both sides of the drive pinion 59 (in FIG. 6(A) and (B), above and below the drive pinion 59 ). These drive shaft bodies 60 , 61 are provided with rack portions 60 a , 61 a meshing with the drive pinion 59 , respectively.

In addition, a lock ring 62 detachably connected to the connection end 16 on the side of the mirror body 8A is provided on the connection end 18 of the drive source unit 8B. The locking ring 62 is pivotably supported on the connection end portion 18 of the drive source unit 8B.

Further, on the inner peripheral surface of the lock ring 62 , for example, a cam groove 63 is formed which is detachably engaged with the engaging pin 47 of the connection end portion 16 on the mirror body portion 8A side. Furthermore, when the mirror body 8A and the drive source unit 8B are connected, the connection end 16 on the mirror body 8A side and the connection end 18 of the drive source unit 8B face each other. At this time, the engaging pin 47 on the mirror body 8A side engages with the cam groove 63 in a state inserted into the cam groove 63 of the driving source unit 8B. In this state, by rotating the locking ring 62 by a desired rotation angle, the engaging pin 47 moves to the locking position at the end of the cam groove 63, whereby the mirror body 8A and the driving source unit 8B are locked in the connected state.

When connecting the scope part 8A and the drive source unit 8B, it is set in such a state that the base end side shaft ends of the pair of working shaft bodies 37, 38 used for the up-and-down bending operation on the side of the scope part 8A are connected to the drive source unit 8B. The end faces of the end-side shaft ends of the drive shafts 60, 61 for bending operation in the up-down direction of the source unit 8B are in contact with each other, and at the same time, the bases of the pair of working shafts 39, 40 for bending operation in the left and right sides are in contact with each other. The end-side shaft ends are in contact with the end surfaces of the end-side shaft ends of the drive shaft bodies 60 , 61 for bending operation in the left-right direction of the drive source unit 8B. In this state, in conjunction with the forward and backward movement of the driving shaft bodies 60 and 61 for bending operation in the vertical direction of the drive source unit 8B, the working shaft bodies 37 and 38 also perform forward and backward motions, whereby the bending portion 10 is moved upward and downward. Perform a bending operation. In conjunction with the movement of drive shafts 60 , 61 for bending operation in the left-right direction of drive source unit 8B, the working shafts 39 , 40 also advance and retreat, whereby the bending unit 10 is bent in the left-right direction.

In addition, on the connecting portion between the connecting end portion 18 of the drive source unit 8B and the connecting end portion 16 on the mirror body portion 8A side, the optical fiber 13 built in the insertion portion 7, the CCD cable 21, the water supply pipe 113, Each connecting end of the air supply duct 114, the suction duct 118, and the like. And, when connecting mirror body portion 8A and driving source unit 8B, each connection end portion of optical fiber 13, CCD cable 21, water supply pipe 113, air supply pipe 114, suction pipe 118 etc. of mirror body portion 8A side, can respectively It is detachably connected to each connection end of the optical fiber 13, the CCD cable 21, the water supply pipe 113, the air supply pipe 114, the suction pipe 118, etc. on the drive source unit 8B side.

Next, the operation of the above configuration will be described. When using the detachable endoscope 1 of the present embodiment, the scope portion 8A and the driving source unit 8B are connected and used. When connecting the mirror body 8A and the drive source unit 8B, the connection end 16 on the mirror body 8A side is brought into abutment with the connection end 18 of the drive source unit 8B. At this time, the engaging pin 47 on the mirror body 8A side engages with the cam groove 63 of the driving source unit 8B in an inserted state. In this state, by rotating the locking ring 62 by a desired rotation angle, the engaging pin 47 moves to the locking position at the terminal end of the cam groove 63, and the mirror body 8A and the driving source unit 8B are locked in a connected state.

In addition, when the scope portion 8A is connected to the drive source unit 8B, it is set in such a state that the base-end side shaft end portions of the pair of working shaft bodies 37, 38 for vertical bending operation on the side of the scope portion 8A, The end faces of the drive shafts 60, 61 for bending operation in the vertical direction of the drive source unit 8B are in contact with each other, and at the same time, the pair of working shafts 39, 40 for bending operation left and right are in contact with each other. The base-side shaft end is in contact with the end surfaces of the distal-side shaft ends of the drive shafts 60 , 61 for bending operation in the left-right direction of the drive source unit 8B.

In addition, in the initial state when the mirror body part 8A and the drive source unit 8B are connected, as shown in FIG. The positions of the shaft end portions on the distal end side of the drive shaft bodies 60 and 61 for bending operation are held at fixed positions arranged at substantially equal positions. At this time, the curved portion 10 of the mirror body portion 8A is maintained in an almost straight linear shape without bending.

In addition, each connecting end portion of the optical fiber 13, the CCD cable 21, the water supply pipe 113, the air supply pipe 114, the suction pipe 118, etc. on the side of the mirror body 8A is detachably connected to the optical fiber 13, The connection ends of the CCD cable 21, the water supply pipe 113, the air supply pipe 114, the suction pipe 118, and the like are connected.

The endoscope 1 is used in a state where the connection work of the scope portion 8A and the drive source unit 8B is completed in this way, and the scope portion 8A and the drive source unit 8B are assembled. When the endoscope 1 is used, the movement of the endoscope 1 is controlled by operating the handpiece 28 of the operation unit 6 . That is, by operating the joystick 29 a of the handpiece 28 , the bending operation of the bending part 10 is performed remotely. In addition, by operating the remote control switches 29b, endoscope operations corresponding to the functions of the respective remote control switches 29b are performed.

And, when bending the bending part 10, the joystick 29a of the handpiece 28 is tilted in a desired direction of operation. A signal generated according to the tilting operation of the joystick 29 a is input to the motor control unit 5 . In addition, when the joystick 29a is tilted, a control signal corresponding to the tilting operation of the joystick 29a is output from the motor control unit 5, so that the drive motor 19a for the up and down bending operation in the drive source unit 8B and the left and right bending operation At least one of the driving motors 19b for use is driven.

Here, when the motor 19a for vertical bending operation is driven, the drive pinion 59 of the drive motor 19a is driven to rotate. When the drive pinion 59 rotates, the pair of drive shafts 60 , 61 are driven forward and backward in the axial direction by the meshing portions of the drive pinion 59 and the rack portions 60 a , 61 a. At this time, the pair of drive shaft bodies 60 and 61 advance and retreat equidistantly in opposite directions, respectively. For example, one drive shaft 60 moves forward for a certain distance toward the mirror body 8A side, while the other drive shaft 61 moves backward at a distance equal to the forward distance of the drive shaft 60 in a direction away from the mirror body 8A.

In addition, due to the base-end side shaft ends of the pair of working shafts 37, 38 for vertical bending operation on the side of the mirror body 8A, and the drive shafts 60, 61 for bending operation in the vertical direction of the drive source unit 8B, The end faces of the shaft ends on the distal end side are in contact with each other. Therefore, in conjunction with the forward and backward movement of the drive shafts 60 and 61 for the vertical bending operation of the drive source unit 8B, the vertical bending operation on the side of the mirror body 8A is performed. A pair of working shaft body 37,38 also advances and retreats.

At this time, for example, as shown in FIG. 6(B), by the drive shaft body 61 moving forward toward the mirror body portion 8A side, one working shaft body 38 is pushed forward, and moves toward the distal end side of the mirror body portion 8A. move forward. The pinion 35 a of the first rotating body 35 rotates clockwise in conjunction with the forward movement of the operating shaft body 38 . When the pinion 35a rotates, the pulley 35b also rotates together with the pinion 35a. Therefore, as shown in FIG. 6(B), as the pulley 35b rotates clockwise, the upper cable 14 wound around the pulley 35b is pulled toward the drive source unit 8B. Along with the pulling operation of the cable 14, the bending portion 10 is bent in the vertical direction.

Then, when the pinion 35a rotates, the operation shaft body 37 on the opposite side to the operation shaft body 38 moves back toward the drive source unit 8B by a distance equal to the advancing distance of the operation shaft body 38 in conjunction with the rotation of the pinion gear 35a. action. At this time, the retracting motion of the operating shaft body 37 is synchronized with the retracting motion of the drive shaft body 61 and operates simultaneously.

In addition, when the drive motor 19b for left and right bending operation is driven, the pair of drive shafts 60 and 61 for right and left bending operation are driven forward and backward in the axial direction by substantially the same motion. In addition, the pair of operation shaft bodies 39 , 40 for lateral bending operation on the side of the mirror body 8A also perform forward and backward motions in conjunction with the forward and backward motions of the respective drive shaft bodies 60 , 61 . At this time, the pinion gear 36a of the second rotating body 36 rotates in conjunction with the forward and backward movement of the operating shaft bodies 39 and 40, and the pulley 36b also rotates together with the pinion gear 36a. Accordingly, the cable 14 wound around the pulley 36b is pulled toward the drive source unit 8B in accordance with the turning operation of the pulley 36b, and the bending portion 10 is bent in the left-right direction in accordance with the pulling operation of the cable 14. operate.

In addition, it is possible to bend the distal end structure portion 11 of the insertion portion 7 of the mirror body portion 8A in a desired direction by combining the vertical bending operation and the lateral bending operation of the bending portion 10 .

Therefore, according to the above configuration, the following effects are obtained. That is, in the present embodiment, a detachable endoscope 1 is provided in which the scope portion 8A and the drive source unit 8B are detachably connected, and the scope portion 8A has an elongated insertion hole that can be inserted into a body cavity. Part 7. Here, in the drive source unit 8B, there are provided: two drive motors 19a, 19b for vertical bending operation and left and right bending operation; A pair of drive shafts 60, 61 for advancing and retreating. In addition, a power transmission unit 34 is assembled inside the large-diameter portion 15 of the base end portion of the scope portion 8A. The power transmission unit 34 transmits the driving force of the bending portion 10 supplied from the driving source unit 8B side as the pulling force of the cable 14 for bending operation. In this power transmission unit 34 , two (first, second) rotating bodies 35 , 36 and four operating shaft bodies 37 , 38 , 39 , 40 are provided. The first rotating body 35 has a pinion 35a and a pulley 35b that rotate integrally, and the second rotating body 36 has a pinion 36a and a pulley 36b that rotate integrally. The first rotating body 35 and the second rotating body 36 are independently and rotatably supported on the pinion shaft 42 . In addition, the base end sides of the two cables 14 for the vertical bending operation to bend the bending portion 10 in the upward and downward direction are fixed to the pulley 35b of the first rotating body 35 in a coiled state. The base end sides of the two cables 14 for bending operation in the left and right directions are fixed to the pulley 36 b of the second rotating body 36 in a wound state. Further, on both sides of the pinion gear 35a of the first rotating body 35, a pair of actuating shaft bodies 37 and 38 for vertical bending operation are arranged in parallel and opposed to each other. Rack portions 37a, 38a meshing with the pinion gear 35a are respectively provided on these operating shaft bodies 37, 38. As shown in FIG. Thus, a rack-and-pinion mechanism is constituted in which the linear motion of the operating shaft bodies 37, 38 is converted into the first rotation by the meshing portion of the rack portions 37a, 38a of the operating shaft bodies 37, 38 and the pinion gear 35a. The rotational movement of the body 35. Similarly, on both sides of the pinion 36a of the second rotating body 36, a pair of actuating shaft bodies 39, 40 for left and right bending operations are arranged in parallel to face each other. Rack portions 39a, 40a that mesh with the pinion gear 36a are respectively provided on these operation shaft bodies 39, 40 . Thus, a rack-and-pinion mechanism is constituted in which the linear motion of the operating shaft bodies 39, 40 is converted into the second rotation through the meshing portion of the rack portions 39a, 40a of the operating shaft bodies 39, 40 and the pinion 36a. The rotational movement of the body 36.

In addition, in this embodiment, when connecting the scope part 8A and the drive source unit 8B, it is set in such a state that the proximal ends of the pair of working shaft bodies 37 and 38 for vertical bending operation on the side of the scope part 8A are The side shaft ends of the drive source unit 8B are in contact with the end faces of the end-side shaft ends of the drive shafts 60, 61 for bending operation in the up-down direction of the drive source unit 8B, and at the same time, a pair of left and right bending operations work together. The shaft ends on the proximal side of the shafts 39 and 40 abut on the end surfaces of the shaft ends on the distal side of the drive shafts 60 and 61 for bending operation in the left-right direction of the drive source unit 8B. In this state, in conjunction with the forward and backward movement of the driving shaft bodies 60 and 61 for bending operation in the vertical direction of the drive source unit 8B, the operation shaft bodies 37 and 38 also perform forward and backward motions, whereby the bending portion 10 is moved upward and downward. direction to perform the bending operation. In addition, in conjunction with the forward and backward movement of the driving shaft bodies 60 and 61 for bending operation in the left and right directions of the drive source unit 8B, the operation shaft bodies 39 and 40 also move forward and backward, thereby bending the bending part 10 in the left and right direction. . As a result, in the present embodiment, a mechanism is assembled inside the large-diameter portion 15 of the base end portion of the mirror body portion 8A. The meshing part is a rack and pinion mechanism that converts the linear motion of the working shaft body 37, 38 into the rotational motion of the first rotating body 35; The meshing part is a rack-and-pinion mechanism that converts the linear motion of the working shaft bodies 39, 40 into the rotational motion of the second rotating body 36, thereby enabling the mirror body part 8A and the mirror body part 8A of the endoscope 1 to The connection portion of the drive source unit 8B is downsized, and the attachment and detachment of the connection portion between the mirror body portion 8A and the drive source unit 8B can be easily performed.

Moreover, Fig.8 (A) - (C) have shown 2nd Embodiment of this invention. In this embodiment, the structure of the power transmission unit 34 incorporated in the large-diameter portion 15 of the scope portion 8A of the detachable endoscope 1 of the first embodiment (see FIGS. 1 to 7(A) and (B)) , with the following changes. In addition, the other parts have the same configuration as the detachable endoscope 1 of the first embodiment, and the same symbols are assigned to the same parts as the detachable endoscope 1 of the first embodiment, and here Its description is omitted.

That is, in the first embodiment, a structure is shown in which the working shaft bodies 37, 38, 39, 40 are respectively arranged on the pinions 35a, 35a, 36a, when the bending operation is performed on the bending part 10, the working shaft bodies 37, 38, 39, 40 on both sides of each pinion 35a, 36a are opposite to each other in conjunction with the rotation of the pinion 35a, 36a. However, in this embodiment, the working shafts 37 and 39 are arranged only on one side of the first and second rotating bodies 35 and 36 .

Furthermore, in this embodiment, the coil spring 71 which always urges the operation shaft bodies 37 and 39 in the direction of the drive source unit 8B is provided. Here, a small-diameter portion 72 is provided on the distal end side of each of the operating shaft bodies 37 , 39 . In addition, a coil sheath holder 73 is protrudingly provided on the base plate 33 on the side of the bent portion 10 of the first and second rotating bodies 35 and 36 . In the coil sheath holder 73 , a through hole through which the narrow diameter portion 72 of each operation shaft body 37 , 39 passes is formed.

In addition, the coil spring 71 is arranged around the narrow diameter portion 72 of each actuation shaft body 37 , 39 in an inserted state. One end of the coil spring 71 is fixed to the coil sheath support 73 in a contact state, and the other end is fixed to the thin diameter portion 72 of each operation shaft part 37, 39 and each operation shaft body in a contact state. 37,39 on the stepped portion between the main bodies. As a result, the actuating shaft bodies 37 and 39 are always biased in the direction of the drive source unit 8B by the elastic force of the coil spring 71 .

Next, the action of the above configuration will be described. In the detachable endoscope 1 according to this embodiment, when the drive source unit 8B and the scope portion 8A are connected, in the normal case where the bending portion 10 is kept in a straightly extending non-bending state, each of the operating shaft bodies 37, 39 Maintain the neutral position shown in Figure 8(A).

In addition, when bending the bending portion 10, as shown in FIG. 8(B), the drive shaft body 60 (see FIG. 6( A), (B)), in the case where each working shaft body 37, 39 overcomes the elastic force of the coil spring 71 and is pushed toward the end portion side of the mirror body portion 8A, with each working shaft body 37, 39 at this time, 39, the pinions 35a, 36a and the pulleys 35b, 36b rotate counterclockwise in FIG. 8(B). Thereby, in FIG.8(B), the lower side cable 14 is pulled, and the bending part 10 bends upwards (or leftward), for example.

In addition, when the bending part 10 is bent, each operation shaft body 37, 39 is acted by the elastic force of the coil spring 71, so that it is always in contact with the end surface of the driving shaft body 60 on the side of the distal end. Therefore, as shown in FIG. 8 ( As shown in C), under the condition that each operating shaft body 37, 39 has moved to the drive source unit 8B side, along with the movement of each operating shaft body 37, 39, the pinion gears 35a, 36a and the pulleys 35b, 36b move toward the drive source unit 8B side. Clockwise rotation in (C). Therefore, in FIG. 8(C), the upper cable 14 is pulled, and the bending portion 10 is bent downward (or rightward), for example. Therefore, the following effects can be obtained according to the above configuration. That is, in this embodiment, the structure of the power transmission unit 34 of the large-diameter portion 15 of the scope portion 8A of the detachable endoscope 1 of the first embodiment is changed to a structure in which the operating shaft bodies 37, 39 are Coil springs 71 are arranged only on one side of the first and second rotating bodies 35 and 36 and always bias the working shaft bodies 37 and 39 in the direction of the drive source unit 8B. Here, if the operating shaft bodies 37, 39 are arranged only on one side of the first and second rotating bodies 35, 36, when the driving shaft body 60 moves to the driving source unit 8B side, it cannot The operation of the shaft body 60 moves the operation shaft bodies 37 and 39 toward the drive source unit 8B side. Therefore, each operation shaft body 37, 39 is biased by the coil spring 71 so that the operation shaft body 37, 39 is always in contact with the end surface of the drive shaft body 60 on the side of the distal end, thereby driving the drive shaft body 60 toward the drive shaft body. When the source unit 8B side has moved, the operation shaft bodies 37 and 39 can be moved to the drive source unit 8B side by the operation of the drive shaft body 60 . As a result, in this embodiment, the pinion 35a (36a) integrally constitutes the pulley 35b (or 36b) around which the cable 14 is wound, and by providing the rack portion 37a (or 39a) meshing with the pinion 35a (36a) ) to rotate the pinion 35a (or 36a) and the pulley 35b (or 36b), and the bending operation can be performed by winding the cable 14, therefore, unlike the first embodiment Compared with the structure (refer to FIG. 3 ), it is possible to provide the scope portion 8A of the detachable endoscope 1 with a fewer number of components, a simpler structure, and a lower cost.

Moreover, Fig.9 (A) - (C) has shown 3rd Embodiment of this invention. In this embodiment, the structure of the power transmission unit 34 incorporated in the large-diameter portion 15 of the scope portion 8A of the detachable endoscope 1 of the first embodiment (see FIGS. 1 to 7(A) and (B)) The following changes have been made. In addition, the other parts have the same structure as the detachable endoscope 1 of the first embodiment, and the same parts as the detachable endoscope 1 of the first embodiment are given the same reference numerals and will be omitted here. its description.

That is, in this embodiment, as in the second embodiment (refer to FIGS. . Furthermore, in the present embodiment, a stepped portion (engagement portion) 81 formed of an annular recess is provided at the shaft end portion of each of the operating shaft bodies 37 and 39 on the drive source unit 8B side. In addition, as shown in FIG. 9(B), step-shaped notches 82 corresponding to the steps 81 of the operation shafts 37 and 39 are provided on the drive shaft 60 on the drive source unit 8B side. And, when connecting the driving source unit 8B and the mirror body portion 8A, as shown in FIG. Together, an anti-off portion that prevents the working shaft bodies 37, 39 from coming off from the driving shaft body 60 is formed.

Next, the action of the above configuration will be described. In the detachable endoscope 1 of this embodiment, before the drive source unit 8B is connected to the scope portion 8A, as shown in FIG. The notch 82 of 60 remains separated.

Then, when connecting the driving source unit 8B and the mirror body 8A, as shown in FIG. . At this time, the stepped portion 81 of each of the operating shaft bodies 37 and 39 is fixed to the notch portion 82 of the drive shaft body 60 in a hooked state. Therefore, in the state where the stepped portion 81 of each working shaft body 37, 39 is engaged with the notch portion 82 of the driving shaft body 60, even if each working shaft body 37, 39 and the driving shaft body 60 move in the axial direction, both The engagement status of the user will not be released.

According to this configuration, when the drive shaft body 60 moves toward the mirror body 8A side, the inner end portion of the cutout portion 82 of the drive shaft body 60 comes into contact with the end portion of the drive source unit 8B side of the respective operation shaft bodies 37 and 39 . , so that each of the operating shaft bodies 37, 39 moves toward the distal end of the mirror body portion 8A. The pinion gears 35a, 36a and the pulleys 35b, 36b rotate counterclockwise in FIG. 9(A) along with the movement of the respective operating shaft bodies 37, 39 at this time. Thus, in FIG. 9(A) , the lower cable 14 is pulled, so that the bending portion 10 is bent upward (or leftward), for example.

And, when the drive shaft body 60 moves to the drive source unit 8B side, the end surface of the notch portion 82 of the drive shaft body 60 engaged with the stepped portion 81 of each operation shaft body 37, 39 pulls each operation shaft body 37, 39 The stepped portion 81 moves the operating shaft bodies 37, 39 toward the drive source unit 8B side. The pinion gears 35a, 36a and the pulleys 35b, 36b rotate clockwise in FIG. 9(A) along with the movement of the respective operation shaft bodies 37, 39 at this time. Therefore, in FIG. 9(A), the upper cable 14 is pulled, and the bending portion 10 is bent downward (or rightward), for example.

Therefore, according to the above configuration, the following effects can be obtained. That is, in this embodiment, the structure of the power transmission unit 34 of the large-diameter portion 15 of the scope portion 8A of the detachable endoscope 1 of the first embodiment is configured such that only the first and second rotations One side of body 35,36 is equipped with working shaft body 37,39, and step portion 81 is set at the shaft end portion of the driving source unit 8B side of each working shaft body 37,39, and the driving shaft body at driving source unit 8B side 60 is provided with a step-shaped notch 82, thus, when connecting the driving source unit 8B and the mirror body 8A, as shown in FIG. The notch portion 82 of the shaft body 60 is detachably engaged to form a detachment preventing portion that prevents the operation shaft bodies 37 and 39 from coming off from the drive shaft body 60 . Therefore, compared with the configuration of the first embodiment (see FIG. 3 ), it is possible to provide the scope portion 8A of the detachable endoscope 1 with fewer parts and a simpler and cheaper configuration.

Moreover, FIG. 10 has shown 4th Embodiment of this invention. In this embodiment, a manual driving force generating unit 91 is provided instead of the driving source unit 8B provided in the detachable endoscope 1 of the first embodiment (see FIGS. 1 to 7(A) and (B)). An electric driving force generating unit 19 . In addition, the other parts have the same structure as the detachable endoscope 1 of the first embodiment, and the same parts as the detachable endoscope 1 of the first embodiment are given the same reference numerals and will be omitted here. its description.

That is, in the manual driving force generating unit 91 of this embodiment, the operation knob 101 for vertical bending operation and the operation knob 102 for horizontal bending operation are provided on the side surface of the drive source unit 8B. These operating knobs 101 and 102 are independently and rotatably supported on the same shaft.

Inside the driving source unit 8B, there is a built-in bending driving mechanism (not shown), which converts the operating force of each operating knob 101, 102 into the straight forward direction of the driving shaft body 60, 61 in the axial direction. back action.

And, when connecting the scope part 8A and the drive source unit 8B, as the respective operation knobs 101, 102 on the side of the scope part 8A are rotated, the pair of drive shafts 60, 61 are equidistant in opposite directions, respectively. advance and retreat movements.

In addition, since the shaft ends on the base end side of the pair of working shafts 37, 38 for vertical bending operation on the side of the mirror body 8A are connected to the drive shafts 60, 61 for vertical bending operations of the drive source unit 8B. Since the end faces of the shaft ends on the distal end side of the mirror body 8A are in contact with each other, the vertical bending operation on the side of the mirror body 8A is performed in conjunction with the forward and backward movement of the drive shafts 60 and 61 for the vertical bending operation of the drive source unit 8B. A pair of working shaft body 37,38 used also advances and retreats.

Thus, as in the first embodiment, the pinion 35 a of the first rotating body 35 (or the pinion 36 a of the second rotating body 36 ) rotates in conjunction with the forward and backward movement of the working shaft bodies 37 and 38 , and the pinion When 35a (or 36a) rotates, the pulley 35b (or 36b) also rotates together with the pinion 35a (or 36a). Therefore, the cable 14 wound around the pulley 35b (or 36b) is pulled in the direction of the drive source unit 8B along with the rotation of the pulley 35b (or 36b). As the cable 14 is pulled, the bending portion 10 is bent.

Therefore, in the above-mentioned structure, due to the structure of the power transmission unit 34 assembled inside the large-diameter portion 15 of the scope portion 8A of the detachable endoscope 1, it has the same structure as the detachable endoscope 1 of the first embodiment. structure, the same effect as that of the first embodiment can be obtained.

Moreover, FIG. 11 is a schematic configuration diagram showing the whole system of the detachable endoscope 1 according to the fifth embodiment of the present invention. This embodiment modifies the configuration of the scope portion 8A of the detachable endoscope 1 according to the first embodiment of the present invention (see FIGS. 1 to 7(A) and (B)) as follows. In addition, the other parts have the same configuration as the detachable endoscope 1 of the first embodiment, and the same parts as the detachable endoscope 1 of the first embodiment are given the same reference numerals, and here Its description is omitted.

That is, in this embodiment, the treatment tool penetration pipe 112 , the water supply pipe 113 , and the air supply pipe 114 inside the insertion portion 7 of the scope portion 8A of the first embodiment are omitted.

In addition, a joystick 29a for remotely performing bending operations on the bending unit 10, a plurality of other remote switches 29b, and the like are arranged on the head 28 of the operating unit 6. As shown in FIG.

In addition, by operating the joystick 29a of the handpiece 28, the bending operation of the bending part 10 can be performed remotely. Further, by operating the remote control switches 29b, endoscope operations corresponding to the functions of the respective remote control switches 29b can be performed.

In addition, this invention is not limited to the said embodiment, It goes without saying that various changes can be added to embodiment in the range which does not deviate from the summary of this invention.

Below, the following additional notes are made to other characteristic technical contents of the utility model application.

(Supplementary note 1) An endoscope device, which is an endoscope device in which an operation part for bending operation and a scope part including: a distal end part, a bending part, an insertion part, and a The connection part of the operation part. The endoscope device is characterized in that a pinion gear is rotatably provided on the connection part, and a winding member for winding the cable is integrally provided on the pinion gear. The axial movement of the pair of opposed shaft members rotates the pinion gear to perform the bending operation.

(Supplementary Note 2) The endoscope apparatus according to Supplementary Note 1, wherein a guide member for guiding the pair of shaft members in the movement direction is provided.

(Supplementary Note 3) An endoscope device characterized in that the guide member described in Supplementary Note 2 is constituted by a guide member in which a narrow slot extending in the moving direction is provided on the side opposite to the rack of the pair of shaft members. slit, and the guide member is provided with a protrusion that engages with the slit.

(Additional Note 4) An endoscope device characterized in that the guide member described in Additional Note 2 is constituted by a guide member in which a pair of shaft members are provided with ends protruding from the rack portion toward the pinion gear side, And the guide member guides the pair of shaft member ends in a slidable manner.

(Supplementary Note 5) The endoscope device according to Supplementary Note 1, wherein an anti-loosening member for preventing the cable from being loosened from the cable winding member is provided.

(Supplementary Note 6) The endoscope device according to Supplementary Note 1, wherein an interference prevention member for preventing the cable from interfering with the pair of shaft members is provided.

(Supplementary note 7) The endoscope apparatus according to supplementary note 1, wherein the insertion member has a rigid or flexible insertion portion main body.

(Additional Note 8) An endoscope, characterized by comprising: an insertion part having a curved part formed by connecting a plurality of curved parts, the insertion part can be inserted into a body cavity; and a base end of the insertion part is provided The base on the side; the main body that can be attached and detached relative to the above-mentioned base; the action unit, which is arranged on the above-mentioned main body, and can move in a straight direction; a rotating body, which is provided on the above-mentioned base, and converts the linear motion of the above-mentioned moving part into a rotating motion; The wire bends the bending portion according to the amount of winding.

(Supplementary Note 9) An endoscope characterized by comprising: an insertion part having a curved part formed by connecting a plurality of curved parts, the insertion part can be inserted into a body cavity; and a base end of the insertion part is provided a side base; a main body that can be attached to and detached from the above-mentioned base; a rotating unit that is provided on the above-mentioned main body and that can rotate; Straight-forward motion; the second action part is arranged on the above-mentioned base, and performs straight-forward motion according to the action of the above-mentioned first action part; the rotating body is arranged on the above-mentioned base, and converts the straight-forward motion of the second action part and a cable whose distal end side is connected to the bending portion and wound around the rotating body, and the cable bends the bending portion according to a winding amount.

(Supplementary Note 10) The endoscope according to Supplementary Note 9, further comprising a second operating member having an abutment portion that abuts against the first operating member, and the second operating member The straight-forward movement is performed by the pressing force of the above-mentioned first movement member during the straight-forward movement.

(Supplementary Note 11) The endoscope according to Supplementary Note 9, comprising a second operating member having an engaging portion that engages with the first operating member, and the second operating member It operates by transmitting the linear movement of the above-mentioned first operating member.

(Supplementary Note 12) The endoscope according to Supplementary Note 8 or 9, wherein a rack portion is formed on the first operating member or the second operating member, and a rack portion is formed on the rotating body. The pinion gear that engages with the rack portion and rotates according to the advance and retreat of the rack portion.

The utility model is effective in the technical field of using a detachable drive source unit endoscope and the technical field of manufacturing the endoscope, wherein the drive source unit detachable endoscope has a built-in driving force generating unit. The source unit is detachably engaged with the base end portion of the insertion portion through the detachable portion, and the driving force generation unit bends a bending portion disposed on a distal end side of the insertion portion of the endoscope.

Claims (5)

1. an endoscope is characterized in that, comprising:

Can be inserted into endoceliac insertion section;

Bending section, it is configured in the terminal part side of above-mentioned insertion section, connects a plurality of bools and constitutes;

Cable, its end side is connected with above-mentioned bending section, and the base end part side of the above-mentioned insertion section of base end part side direction is extended, and this cable is the cable that the bending operation of above-mentioned bending section is used;

Connecting portion, it is arranged on the base end side of above-mentioned insertion section;

Rotary body, its rotatable earth's axis is bearing on the above-mentioned connecting portion, and is fixed with the base end part side of above-mentioned cable on this rotary body with the state of reeling;

Power transfer unit, it is arranged at above-mentioned connecting portion, and has and can directly advance the work axis body that moves on the direction, and this power transfer unit converts the translatory movement of above-mentioned work axis body to above-mentioned rotary body rotatablely move;

The drive source unit, it releasably is connected with above-mentioned connecting portion, and has the driving force generation unit that produces the driving force that makes above-mentioned bending section bending;

Motor unit, it is arranged in the above-mentioned drive source unit, have and directly to advance the driving axis body that moves on the direction, when above-mentioned drive source unit is connected with above-mentioned connecting portion, this motor unit makes above-mentioned work axis body carry out translatory movement according to the action of above-mentioned driving axis body, wherein, above-mentioned driving axis body is directly advancing the enterprising action work of direction.

2. endoscope according to claim 1 is characterized in that,

Above-mentioned motor unit has: rotary unit, and it can rotate by means of the driving force from above-mentioned driving force generation unit; Power converting unit, the rotation of itself and above-mentioned rotary unit make above-mentioned driving axis body carry out straight precession in linkage and do.

3. endoscope according to claim 1 and 2 is characterized in that,

Above-mentioned driving axis body has abutting part, when being connected with above-mentioned connecting portion in above-mentioned drive source unit, and the paired top of the end butt state of above-mentioned abutting part and above-mentioned work axis body,

Above-mentioned motor unit has the unit that pushing force when carrying out straight precession and do by means of above-mentioned driving axis body to drive as direction to straight precession above-mentioned work axis body.

4. endoscope according to claim 1 and 2 is characterized in that,

Above-mentioned work axis body has the holding section that releasably engages with above-mentioned driving axis body, and has and prevent that when connecting above-mentioned drive source unit and above-mentioned connecting portion above-mentioned work axis body is from anti-delinking part that above-mentioned driving axis body is deviate from.

5. endoscope according to claim 1 is characterized in that,

Above-mentioned rotary body has pinion,

Above-mentioned work axis body has the tooth-strip part with above-mentioned pinion,

Above-mentioned power transfer unit has pinion and rack, and this pinion and rack has above-mentioned tooth-strip part and above-mentioned pinion.

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